| Notice to the Reader:
The roofing assembly / material information published in the RCABC Roofing Practices Manual and offered below does NOT represent a complete set of the manufacturer’s data or specifications. The preparation of a detailed specification is the responsibility of the design authority.
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Manufacturer: Johns Manville Corporation
- Accepted for RoofStar Guarantee Program
- Date TBA
- Product Summary
- Invinsa™ Roof Board is a resilient, lightweight roof board designed as an integral component of the roof system, providing a protective layer for the insulation, while working with the membrane above to ensure maximum performance and longevity.
- This patent-pending, high-density polyisocyanurate technology is bonded in-line to mineral-surfaced, fiber glass reinforced facers. In single ply and bituminous cold-applied and self-adhered roof systems, Invinsa enhances fire, water and hail resistance, and it will not support mold growth.
- The roofing assembly / material information published in the RCABC Roofing Practices Manual does NOT represent a complete set of the manufacturer’s data or specifications. The preparation of a detailed specification is the responsibility of the design authority.
- Code Approvals and Testing
- Invinsa has been tested according to the requirements of ASTM C 209, C 473, C 518, C 1289, D 1037, D 1621, D 2126, D 3273 and E 96. It has been classified by Underwriters Laboratories Inc. as an approved cover board for certain Class “A” fire-rated roof constructions. It can be used in numerous FM Global 1A-90 or above roof constructions.
- Use
- Invinsa optimizes roof system performance in new, re-cover and re-roof applications. It can be installed over an existing roof to increase the integrity of the new roof. The coated fiber glass facers provide strong, smooth surfaces suitable for mechanically attached or fully adhered membranes, without the need for priming.
- Advantages
- Invinsa’s light weight offers labour and installation efficiencies and allows more options for situations where the overall weight is a concern.
- Light weight also means easy hoisting, staging and manoeuvring around the roof.
- High impact and flexural strength provide increased resistance to damage from various sources, including but not limited to hail, foot traffic, construction loads and normal roof maintenance.
- Low water absorption characteristics offer performance benefits in diverse environments.
- JM Invinsa roof board is user friendly, allowing easy and efficient scoring, cutting and snapping, which permits fast, tight fabrication around roof penetrations.
- Board composition provides a low dust environment and smooth surface for better adhesion.
- Flexibility means less breakage during handling, and in re-cover applications it allows Invinsa to accommodate minor irregularities in existing roofs.
- Typical Physical Properties
|
English Units |
Metric Units |
ASTM Test Method |
| Thickness (nominal) |
1/4 in. |
6.4 mm |
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| Width |
4ft |
1.22 m |
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| Length, Standard |
4ft |
1.22 m |
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| |
8ft |
2.44 m |
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| Flexural Strength |
2000 psi
28 lbf |
13,790 kPa
4.9 kN/m |
D 1037
D 1037 |
| Dimensional Stability |
<0.6% |
<0.6% |
D 2126 |
| Moisture Vapor Permeance |
<1 perm |
<57.5 ng/Pa•s•m² |
E 96 |
| R-Value |
1.0 (hr•ft²•°F)/Btu |
0.18 m²•ºC/W |
C 518 |
| Water Absorption (max) |
2.6% |
2.6% |
C 209 |
| Compressive Strength (min) |
150 psi
21,600 psf |
1034 kPa
1,034,200 Pa |
D 1621 |
| Surface Water Absorption Mold Resistance |
<1 gram Pass |
<1 gram Pass |
C 473
D 3273 |
| Weight per 4' x 8' Sheet (1.22 m x 2.44 m) |
12 ± 2 lbs |
5.4 ± 0.9 kgs |
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| Weight per Pallet (4' x 8' sheets) |
370 lbs |
167 kg |
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Sheets per Pallet
4' x 8' (1.22 m x 2.44 m)
4' x 4' (1.22 m x 1.22 m) |
30 Sheets
30 Sheets |
30 Sheets
30 Sheets |
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- Click below for the Technical Data Sheet.
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